Electrical conductor.



No. 847,303. 7 PATENTED MAR. 12, 1907.

P.PLATT.

ELECTRICAL CONDUCTOR.

APPLICATION FILED AUG.4,1904.

FREDERICK PLATT, OF LYNN, MASS hcnusnr'rs,

PATENT ornron;

COMPANY, A CORPORATION OF NEW YORK.

ELECTRICAL ooNoucTon.

f Na-8147,3613.

Specification of Letters ratent." Application flied. August 4,1904.Serial a. 219.536.

Patented March. 12, 1907 To all whom may concern.-

- Be it known that I,FREDERIOK PLATT, a

subject of the King of Great Britain, residing at Lynn, county of Essex,State of Massachusetts, have invented certain'new and usefubImprovements in Electrical "Conductors, which the following is aspecification.

. My present invention relates to the securing together of rigid andflexible conductors, and more particularly to securing flexibleconductors or pigtails to carbon brushes.

The various features of novelty which characterize my invention arepointed out with particularity in the claims annexed to and formin apart of this specification. For a better un erstanding of my invention,however, reference may be had to the accomanying drawings anddescription, in which have illustrated and described one embodiment ofmy invention.

Of the drawings, Figure l is a erspective view of a carbon brush'havinga exible conductor secured thereto in accordance with my invention. Fig.2 is a sectional elevation of the brush shown in Fig. 1.

In the drawings, 1 represents an ordinary prism-shaped carbon brushrectangular in cross-section. A channel, passage, or recess 2 is'formedin one side of the brush by boring or. otherwise. Preferably the bottomof the recess 2 is countersunk at-3, as shown. A

' channel or assage 4, starting in the upper end face of t e-brush, isbored to intersect the channel or opening 2 near its inner end. Afterthe holes 2 and 4 are formed the upper end of the brush iscopper-plated. After the end of the brush is co per-plated one end ofthepigtail or flexib e conductor 5, which may be formed of fine copperwires braided together in the usual manner, is inserted in the hole 4with its tip engaging the lower wall of the opening or recess 2. A massof solder 6, inserted in the hole or opening 2, is employed to securethe lower end of the flexible conductor 5 to the brush. a i

It will be observed that the channel 4 is substantially the same indiameter. as the conductor 5, while the opening 2 is of considerablygreater diameter and is quite shallow. The dimensions of the opening 2conduce to the protection of a good coating of copper on the wall of thechamber 2, thereby insuring a good solder connection between the brushand the flexible conductor. As the solder is supplied through thepassage 2 and as the channel or passage 4 is substantially the same indiameter as the conductor 5, there is no tendency for the solder to runup the conductor 5. In consequence the flexible con' ductor is solderedto the brush only at its extreme lower end'. This insures that theflexibility of the conductor 5 is not decreased b the presence of solderat the point at whic the flexible conductor leaves the upper end of thebrush;

What I claim as new, and desire to secure by Letters Patent of theUnited States, is

1. In combination, a carbon brush formed with intersecting passages orchannels init, said channels entering said brush from opposite sides, aflexible conductor inserted in one of said channels, and solder forsecuring said brush and said conductor together inserted throu h theother channel.

2. In combination, a carbon brush having a channel or opening formed inone side, a-

flexible conductor havin a ortion inserted therein, said carbon brusbemg formed with a second channel or opening intersecting the firstchannel or opening at an angle, and solder inserted through said secondchannel or opening for securing the flexible conductor to the brush at apoint remote from the side of said brush entered by the flexibleconductor.

3. In combination, a brush having a recess formed in it in which one endof a flexible conductor is inserted, and means for soldering theflexible conductor to the brush only at a point remote from that atwhich the conductor leaves the brush.

4. In combination, a brush having a hole or recess formed in it, anda'fiexible conductor extending into said hole or recess and soldered tothe brush at the bottom only of said hole or recess. 1

5. In combination, a brush havin a hole or recess formed in one side ofsai brush, and a flexible conductor entering said hole or recess andsoldered to said brush only at a point remote from the surface of thebrush penetrated by said hole or recess.

6. A carbon brush havin holes or passages extending om different sidesinto but not through said brush, a flexible conductor having a portioninserted in one of said channels, and solder for securing said brush andsaid conductor together inserted through said other channel.

intersecting ASSIGNOR. TO GENERAL 7. In combination, a carbon brushformed with a channel 01' passage in it into which it flexible conductoris inserted, and a seconil passage intersecting th 'lllrt-llillllO-(lchannel or passage Lhrough which secmnl passage sol- I iler may heinserted in wcure the flexible I sec-ting holes orpassages extendingfrom clifi'ercnt sides info but not fhrmi h sniil brush, a flexiblecnnilnetor having a portion arranged in one of said channels, and meansin the utllfil of said channels for securing said cuinlnctor to thebrush.

In witness whereof I. have hereunto set my 20 haml this 2d (lay ofAugust, 1904.

FREDERICK PLATT.

Witnesses i DUGALD McK. MCKILLOP. JOHN A. MCMANUS.

